Nailing apparatus



1. D. BELL.

NAILING APPARATUS.

APPLICATION FILED 1ULY 24. I9I9.

1,366,050. PatetedfJan. 1s, 1921.

nih.

J. n. BELL. NAILING APPARATUS.

APPLICATION FLD JULY 24 |919.`

,$366,050. Patented Jan. 18, 1921.

2 SHEIITS-*SHEET 2.

' worker canmake as good time as a UNITED STATES 4PATENT OFFICE.,`

JOSEPH D. BELL, OF ROCKFORD, ILLINOIS.

NAILING APPARATUS.

Specification of Letters Patent.

Patented Jan. 18, 1921.

Application led July 24, 1919. Serial No. 313,122.

To all whom it may concern: Y y

Be it known that I, JOSEPH D. BELL, a citizen of the United States, iesiding at Rockford, in the county of Winnebago and State of Illinois, have invented new and advantageous for fastening by means oit'` tacks an edge of a piece of fabric to an article to be upholstered, as, for instance, for upholstering davenports.v`

At present, a skilled upholsterer puts a supply of tacks in his mouth and with his tongue turns each tack in 'succession `so that its head is directed outward. He uses a magnetized hammer, and when he places the magnetized part of the hammer against the head or' the tack so disposed in his mouth, the tack clings to the hammei"1 in such a manner that it can be driven` without further handling. This manner of feeding the tacks to the hammer `with the tongue requires long practice, and, consequently, high wages are demanded. j

The dil'liculty of so feeding the tacks is not the onl` diiiiculty that "abeginner encounters. e cannot always'drivepthe tack into the place where it should go, andoi'ten drives it far out of the line. From both of these causes, unless skilled labor is used, which is expensive and uncertain, the work of tacking upholsteryY progresses slowly and a good deal or' the work is spoilt.

The object of the present invention is to provide a device which can be operated by a very simple operation of either hand, so that it is not necessary `to Jfeed the tacks by the tongue, but they can be fed by hand, and so that, when atack is placed on the hammer of the device, it is driven in the place intended, in aline with the others and properly spaced, and all driven well in with one stroke, so that an inexperienced. skilled worker by the old system. f"

In the accompanying drawing, Figure 1 is a vertical sectional view showing my improved apparatus in use; Figs. 2 and 3 are crosssectional views on the lines 2-2 and SW3 respectively of Fig. 5; Fig. 4 is a plan view of the apparatus detached; Fig. 5 is a side view of the apparatus detached, on a scale larger than in F ig. 1 and in a direc` tion at right angles to that of F ie. 1.

Belerri-ng to the drawing, 1 indicates a table, on which is placed an article 2, here shown as a davenport seat, to be upholstered.

It is pressed down onsaid table by means of a longitudinally 'extending beam 3, here shown only in cross section, which-is pressed turning it, and screwed through a threaded sleeveI or vnut 7, which is held against up ward movement by a recessed block 8, pressed against the ceiling 10 of the room, or a part depending therefrom.

11 indicates a horizontally extending strip `or board secured, as Ashown at 12, to the legs ofthe table and against which is supported by brackets 13, one only being here shown,

a horizontally extending strip 14, the upper edge of which is formed into a rack 15, (Fig. 5) and which strip 14. carries, at the top of the side next to the table, a metallic strip 16 secured thereto, the upper edge of said strip 16 forming a track.

This track is hereshown as straight, this being the nform required for driving a straight row of tacks or nails, but it is not necessarily so, and will correspond in form or curvature with the form or curvature of the object into which it is desired to drive the nails or tacks.

Traveling on said track, is an inverted channel-shaped carrier 17, here shown as formed of two pieces 18 oit' angle iron, the horizontally extending members of which are riveted together, one beneath the other. ,Secured to the side of said carrier remote `from the table 1 is the top of adepending bar 19, from the lower end of which extends toward the table a yoke 21 in which is pivoted a roller 22, bearing against said strip 14. Riveted to the middle portion of said carrier is the middle of a yoke 2B, `(Fig.` 1) the sides of which extend upwardly from said carrier, and throughthe ends of said yoke extends a bolt 27. Said bolt 27 also extends through the upper end of an arm 25, -iormed oi two halves, one on'each side oi. a hammer handle 26, the upper ends of said halves being secured to said handle by the bolt 27, and a bolt. 24 also passing through the lower end of said handle and through the middle portion olf said arm, so that said handle moves rigidly with said arm 25. Through registering holes 28 (Fig.

ioo

2) in the lower ends of the two halves of the arm 25 extends the inner end of a coiled spring 29, the outer end of whichA extends throughv a hole in a. bent-up end 31 of a bar 32 secured to the carrier, and extending horizontally and outwardly therefrom.

Pivoted upon -said bolt 24 and rocking with the arm 25 'and hammer handle 26, its upper end being secured to said arm 25, by the bolt 2 7, is a lever .34', the lower end of which is pivoted, as shown at 36, to one end of a twisted link 37, the other end of which is pivoted, as shown at 38, to a dog 39. One

end o1 said dog carries a stud 4l which eX- tends through as lot 42 extending longitudinally in said bar 32, while the other end ot said dog has a hole 43 in which is contained a sleeve 45, which also depends through a slot 46 extending longitudinally in a guide 'plate 47, and parallel with the track. One

end of the guide plate 47 is riveted-to the central portion oit' the carrier, the guide plate in generalextending behind said central portion, which, in proximity to the guide plate, is cut away between the depending sides of the carrier, so that the guide plate extends between said depending portions. The lower end of said sleeve 45 is flanged, as shown at50, (Fig. 3) to retain the sleeve in the slot 46. Through said sleeve 45 slides vertically7 a bolt 44 carrying at its upper end a nut 48 and the head of the bolt, which is lowermost, is adapted, in one extreme position of its reciprocating movement with Said dog, to impinge against the adjacent end of the central portion ot the carrier, and, Vin the other extreme position of itsmovement, to impinge against one of the faces ofthe rack 15.

The device is operated lin the following manner: The operator, taking hold of the upper portion of the hammer aboveV the upper end of the arm 25, either be'iforc, while, or after drawing backward with his right hand said upper portion against the tension of the coiled spring 29, places with his let hand the head of a tack 5l (F ig. l) against magneti/Zed portion 49 of the hammer head. Theeect of drawing back the upper portion of the hammer is to move its lower portion toward the table, stretching the spring 29, and also to move the lower end of the lever 34 toward the table. It being supposed that the head or lower end ot the bolt`44 is abutting against a face or the rack. l5, as shown in Fig. l, the adjacent end of the dog 39 remains at rest, while the dog 39 itselt swings about the hole 43 as center, since it is moved toward the table by means of the twisted link 37, moved with the lower end of the lever 34. The movement, in an arc of a circle about the holeI 43 as center. ot' the, other end of the dog and of the stud 4l in the slot 42, causes the bar l2 and the carrier to moveI on the track LG in the direction a\vaj,irom that tace oi the rack which is engaged by the had of the bolt 44. -The parts are of such Jiol-m and magnitude that the distance through which the carrier so moves brings the hammer into the correct position to drive the next tack. The operator then lets go of the hammer and the hammer head then springs loiwznd with uniform velocity, namely, that due to the tension of the coiled spring 29, and drives the tack through the upholstery and into the object to which it is to be attached. The iieed is gained by bringing the member 39 from an angular position relative to the slot 4G to practically a parallel position relative thereto, and while doing so the holt 44 is pressed tightly against a rack tooth l5, thereby conipelling` the whole device to move along the rack until the device is moved to such a distance that when the hammer is in its position to rest, the bolt 44 will be in a position to drop behind the next tooth l5 in the rack.

l claim l. The combination of a carrier, a track otal supportin one direction. the movement of the hammer in the opposite direction energizing said spring, and a device moved hy the movement of the hammer` relatively lo he carrier and engaging the rack to advance the carrier through a predetermined distance on its track with each complete vibration oi' the hammer.

2. The combination ot' a carrier. a track upon which. said carrier` can move. a rack extending adjacent to the track, a hammer pivotally supported upon .said carrier, a spring for moving said hammer ou its piv otal support in one direction, the movement of the hammer in the opposite direction energizing said spring, said carrier having longitudinally slotted members resliaetivelj' parallel with, and at right angles to, the direction ot movement olf the carrier, a dog. devices at its ends extending into the al( of said members, one ot' said dcviic-s heinN adapted to engage the successive 'laces o l the rack, a lever-rocking` with the hammer, ani a link connected at one end with said lever and at the other end with said dog.

JOSEPH l). BELL. 

